:root {
    --bb-bg: #010409;
    --bb-panel: rgba(8, 15, 30, 0.94);
    --bb-border: rgba(56, 189, 248, 0.12);
    --bb-glow: rgba(56, 189, 248, 0.35);
    --bb-text: #e8eef7;
    --bb-muted: #5c6b82;
    --bb-accent: #38bdf8;
    --bb-amber: #f59e0b;
    --bb-go: #22c55e;
    --bb-caution: #f59e0b;
    --bb-nogo: #ef4444;
    --bb-mono: "JetBrains Mono", monospace;
    --bb-sans: "Inter", system-ui, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: var(--bb-sans);
    background: var(--bb-bg);
    background-image:
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(56, 189, 248, 0.08), transparent),
        linear-gradient(180deg, #010409 0%, #020617 100%);
    color: var(--bb-text);
    min-height: 100vh;
    overflow-x: hidden;
}

.mono { font-family: var(--bb-mono); font-size: 0.8rem; }

.bb-app {
    max-width: 1680px;
    margin: 0 auto;
    padding: 0.75rem 1rem 1.5rem;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    width: 100%;
    min-width: 0;
}

.bb-header {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-areas:
        "brand session"
        "title title";
    align-items: end;
    gap: 0.75rem 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--bb-border);
    margin-bottom: 0.75rem;
}

.bb-header__brand-row {
    grid-area: brand;
    flex-wrap: wrap;
    min-width: 0;
}

.bb-header__title {
    grid-area: title;
    min-width: 0;
}

.bb-header__session {
    grid-area: session;
}

.bb-nav { display: flex; gap: 0.75rem; align-items: center; font-size: 0.7rem; letter-spacing: 0.1em; }
.bb-nav__link { color: var(--bb-muted); text-decoration: none; }
.bb-nav__link:hover { color: var(--bb-accent); }
.bb-nav__active { color: var(--bb-accent); font-weight: 600; }

.bb-header__tag {
    font-size: 0.6rem;
    letter-spacing: 0.22em;
    color: var(--bb-muted);
}
.bb-header h1 {
    font-size: 1.75rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-shadow: 0 0 40px var(--bb-glow);
}

.bb-header__session {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    align-items: stretch;
    min-width: 0;
    width: 100%;
    max-width: 280px;
}
.bb-header__session label { font-size: 0.55rem; color: var(--bb-muted); letter-spacing: 0.15em; }

.bb-select {
    background: rgba(0, 0, 0, 0.5);
    border: 1px solid var(--bb-border);
    color: var(--bb-text);
    padding: 0.4rem 0.6rem;
    border-radius: 4px;
    width: 100%;
    max-width: 100%;
    min-width: 0;
    font-size: 0.75rem;
}

.bb-btn {
    font-family: var(--bb-mono);
    font-size: 0.65rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 0.45rem 0.85rem;
    border: 1px solid var(--bb-accent);
    background: rgba(56, 189, 248, 0.12);
    color: var(--bb-accent);
    border-radius: 4px;
    cursor: pointer;
}
.bb-btn:hover { background: rgba(56, 189, 248, 0.22); }
.bb-btn--ghost { border-color: var(--bb-border); color: var(--bb-muted); background: transparent; margin-top: 0.5rem; }
.bb-btn--small { padding: 0.25rem 0.5rem; font-size: 0.6rem; }

.bb-debrief-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
}

.bb-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    grid-template-areas:
        "timeline timeline"
        "replay replay"
        "ais visus"
        "hist hist"
        "oldsalt memory"
        "debrief debrief";
    gap: 0.65rem;
    flex: 1;
    min-width: 0;
    width: 100%;
}

.bb-panel {
    background: var(--bb-panel);
    border: 1px solid var(--bb-border);
    border-radius: 6px;
    padding: 0.65rem 0.75rem;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.03);
    min-width: 0;
    overflow: hidden;
}

.bb-panel--timeline { grid-area: timeline; }

.bb-panel--replaymap {
    grid-area: replaymap;
    display: flex;
    flex-direction: column;
    min-height: clamp(280px, 36vh, 420px);
}

.bb-panel--replay { grid-area: replay; }

.bb-panel--ais { grid-area: ais; }

.bb-panel--visus { grid-area: visus; }

.bb-panel--hist-insight { grid-area: hist; }

.bb-panel--oldsalt { grid-area: oldsalt; }

.bb-panel--memory { grid-area: memory; }

.bb-panel--debrief { grid-area: debrief; }

.bb-panel--replaymap .bb-panel__head .is-live,
.bb-panel--replaymap .nav-status-row .is-live {
    color: #38bdf8;
}

.bb-footer .is-live {
    color: #38bdf8;
}

.bb-panel__head {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 0.35rem 0.5rem;
    margin-bottom: 0.5rem;
    padding-bottom: 0.35rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}
.bb-panel__head h2 {
    font-size: 0.62rem;
    letter-spacing: 0.2em;
    color: var(--bb-accent);
    font-weight: 600;
}
.bb-meta { color: var(--bb-muted); font-size: 0.65rem; }

.bb-meta.bb-meta--error {
    color: #fca5a5;
}

.bb-meta.bb-meta--warn {
    color: var(--bb-amber);
}

.bb-visus-note--warn {
    color: var(--bb-muted);
    font-size: 0.58rem;
    line-height: 1.45;
}

.bb-scrubber {
    width: 100%;
    accent-color: var(--bb-accent);
    margin: 0.5rem 0 0.25rem;
}
.bb-scrubber-labels {
    display: flex;
    justify-content: space-between;
    color: var(--bb-muted);
    font-size: 0.6rem;
    margin-bottom: 0.5rem;
}

.bb-timeline-track {
    display: flex;
    gap: 2px;
    overflow-x: auto;
    padding: 0.5rem 0;
    min-height: 52px;
    align-items: flex-end;
}

.bb-marker {
    flex: 0 0 auto;
    min-width: 28px;
    height: 36px;
    border-radius: 3px 3px 0 0;
    border: 1px solid var(--bb-border);
    background: rgba(15, 23, 42, 0.8);
    cursor: pointer;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding-bottom: 2px;
    font-family: var(--bb-mono);
    font-size: 0.5rem;
    color: var(--bb-muted);
    transition: transform 0.15s, border-color 0.15s, box-shadow 0.15s;
}
.bb-marker:hover { border-color: var(--bb-accent); color: var(--bb-accent); }
.bb-marker.active {
    border-color: var(--bb-accent);
    box-shadow: 0 0 12px var(--bb-glow);
    transform: scaleY(1.15);
    color: var(--bb-accent);
}
.bb-marker[data-kind="anomaly"] { border-color: var(--bb-nogo); }
.bb-marker[data-kind="human"] { border-color: var(--bb-amber); }
.bb-marker[data-kind="decision"] { border-color: var(--bb-go); }
.bb-marker[data-kind="vessel"] { border-color: #38bdf8; color: #7dd3fc; }

.bb-frame-detail {
    font-size: 0.7rem;
    color: var(--bb-muted);
    margin-top: 0.5rem;
    padding: 0.5rem;
    background: rgba(0, 0, 0, 0.35);
    border-left: 2px solid var(--bb-accent);
    line-height: 1.45;
    overflow-wrap: anywhere;
    word-break: break-word;
}

.bb-decision-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.75rem;
    padding-top: 0.5rem;
    border-top: 1px solid var(--bb-border, rgba(255, 255, 255, 0.08));
}

.gongo-badge {
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    border: 1px solid var(--bb-caution);
}
.gongo-badge[data-status="GO"] { color: var(--bb-go); border-color: var(--bb-go); }
.gongo-badge[data-status="NO-GO"] { color: var(--bb-nogo); border-color: var(--bb-nogo); }
.gongo-badge[data-status="CAUTION"] { color: var(--bb-caution); border-color: var(--bb-caution); }

.bb-weather-summary {
    font-size: 0.82rem;
    color: #e2e8f0;
    line-height: 1.5;
    margin-bottom: 0.45rem;
    padding: 0.45rem 0.55rem;
    background: rgba(15, 23, 42, 0.65);
    border: 1px solid rgba(56, 189, 248, 0.25);
    border-radius: 4px;
}

.bb-weather-summary.is-empty {
    color: var(--bb-muted);
    font-size: 0.68rem;
}

.bb-live-strip {
    font-size: 0.68rem;
    color: var(--bb-amber);
    line-height: 1.45;
    margin: -0.2rem 0 0.45rem;
    padding: 0.35rem 0.55rem;
    border-left: 2px solid rgba(251, 191, 36, 0.45);
}

.bb-frame-context {
    font-size: 0.68rem;
    color: var(--bb-muted);
    line-height: 1.45;
    margin-bottom: 0.5rem;
    padding: 0.4rem 0.5rem;
    border-left: 2px solid var(--bb-accent);
    background: rgba(56, 189, 248, 0.06);
}

.bb-metrics {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.4rem;
    margin-bottom: 0.5rem;
}
.bb-metric {
    padding: 0.45rem;
    background: rgba(0, 0, 0, 0.35);
    border: 1px solid rgba(255, 255, 255, 0.04);
    border-radius: 4px;
}
.bb-metric h4 { font-size: 0.5rem; letter-spacing: 0.12em; color: var(--bb-muted); margin-bottom: 0.2rem; }
.bb-metric p { font-family: var(--bb-mono); font-size: 0.8rem; }

.bb-oldsalty-bar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.65rem 1rem;
    margin-bottom: 0.65rem;
    padding: 0.55rem 0.75rem;
    border: 1px solid var(--bb-border);
    border-radius: 6px;
    background: var(--bb-panel);
}

.bb-oldsalty-bar__head {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    flex-shrink: 0;
}

.bb-oldsalty-bar__head h2 {
    font-size: 0.62rem;
    letter-spacing: 0.2em;
    color: var(--bb-accent);
    font-weight: 600;
}

.bb-oldsalty-ask--bar {
    flex: 1;
    min-width: min(100%, 280px);
    margin-bottom: 0;
}

.bb-replay-map-wrap {
    flex: 1;
    min-height: 200px;
    position: relative;
}

.bb-replay-map-empty {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 1rem;
    font-size: 0.68rem;
    color: var(--bb-muted);
    background: rgba(0, 0, 0, 0.45);
    pointer-events: none;
    z-index: 2;
}

.bb-replay-map-empty[hidden] {
    display: none;
}

.bb-oldsalty-intro { font-size: 0.7rem; color: var(--bb-muted); font-style: italic; margin-bottom: 0.5rem; }
.bb-oldsalty-ask {
    display: flex;
    gap: 0.45rem;
    align-items: stretch;
    margin-bottom: 0.55rem;
}
.bb-oldsalty-input {
    flex: 1;
    min-width: 0;
    font-size: 0.72rem;
    padding: 0.5rem 0.6rem;
    border-radius: 4px;
    border: 1px solid rgba(56, 189, 248, 0.25);
    background: rgba(2, 6, 23, 0.65);
    color: var(--bb-text);
}
.bb-oldsalty-input:focus {
    outline: none;
    border-color: rgba(56, 189, 248, 0.55);
}
.bb-oldsalty-answer {
    font-size: 0.78rem;
    line-height: 1.5;
    margin-bottom: 0.55rem;
    padding: 0.55rem 0.65rem;
    border-radius: 4px;
    border: 1px solid rgba(56, 189, 248, 0.2);
    background: rgba(56, 189, 248, 0.06);
    color: #e2e8f0;
}
.bb-oldsalty-q {
    display: block;
    font-size: 0.62rem;
    color: var(--bb-muted);
    margin-bottom: 0.35rem;
}
.bb-oldsalty-context {
    font-size: 0.6rem;
    color: var(--bb-muted);
    letter-spacing: 0.06em;
    margin-bottom: 0.35rem;
}
.bb-oldsalt-badge { font-size: 0.55rem; letter-spacing: 0.15em; color: var(--bb-amber); }
.bb-narrative {
    font-size: 0.88rem;
    line-height: 1.55;
    margin-bottom: 0.65rem;
    border-left: 3px solid var(--bb-amber);
    padding-left: 0.65rem;
}
.bb-list { list-style: none; margin-bottom: 0.5rem; }
.bb-list li {
    font-size: 0.75rem;
    padding: 0.25rem 0 0.25rem 0.75rem;
    position: relative;
    color: var(--bb-text);
}
.bb-list li::before { content: "▸"; position: absolute; left: 0; color: var(--bb-accent); }
.bb-list--alert li::before { color: var(--bb-nogo); }
.bb-human-note { font-size: 0.68rem; color: var(--bb-muted); margin-top: 0.35rem; }

.bb-subhead { font-size: 0.55rem; letter-spacing: 0.14em; color: var(--bb-muted); margin: 0.5rem 0 0.35rem; }

.bb-pattern {
    padding: 0.4rem 0.5rem;
    margin-bottom: 0.35rem;
    border-radius: 4px;
    border-left: 3px solid var(--bb-accent);
    background: rgba(0, 0, 0, 0.3);
    font-size: 0.72rem;
}
.bb-pattern[data-severity="high"] { border-left-color: var(--bb-nogo); }
.bb-pattern[data-severity="medium"] { border-left-color: var(--bb-caution); }

.bb-memory-list { list-style: none; }
.bb-memory-list li {
    font-size: 0.72rem;
    padding: 0.4rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    cursor: pointer;
}
.bb-memory-list li:hover { background: rgba(56, 189, 248, 0.06); color: var(--bb-accent); }

.bb-debrief-exec { font-size: 0.8rem; line-height: 1.5; margin-bottom: 0.5rem; }
.bb-ai-vs-human { font-size: 0.7rem; color: var(--bb-muted); }
.bb-ai-vs-human .entry {
    padding: 0.35rem;
    margin-top: 0.25rem;
    background: rgba(0, 0, 0, 0.25);
    border-radius: 3px;
}

.bb-float-tip {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    gap: 0.85rem 1rem;
    margin-top: 1.25rem;
    padding: 0.95rem 1rem;
    border: 1px solid rgba(248, 113, 113, 0.45);
    border-radius: 8px;
    background: linear-gradient(
        135deg,
        rgba(248, 113, 113, 0.1) 0%,
        rgba(15, 23, 42, 0.92) 55%
    );
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

.bb-float-tip[hidden] {
    display: none !important;
}

.bb-float-tip__icon {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    flex-shrink: 0;
    padding: 0.45rem 0.7rem;
    border-radius: 999px;
    border: 1px solid rgba(248, 113, 113, 0.5);
    background: rgba(15, 23, 42, 0.85);
    font-family: var(--bb-mono, "JetBrains Mono", monospace);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    color: #f8fafc;
}

.bb-float-tip__dot {
    width: 0.55rem;
    height: 0.55rem;
    border-radius: 50%;
    background: #ef4444;
    animation: bb-float-tip-pulse 1.4s ease-out infinite;
}

@keyframes bb-float-tip-pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.55);
    }
    70% {
        box-shadow: 0 0 0 8px rgba(239, 68, 68, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(239, 68, 68, 0);
    }
}

.bb-float-tip__copy {
    flex: 1 1 14rem;
    min-width: 0;
}

.bb-float-tip__title {
    margin: 0 0 0.35rem;
    font-size: 0.82rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: #fca5a5;
}

.bb-float-tip__body {
    margin: 0;
    font-size: 0.74rem;
    line-height: 1.45;
    color: var(--bb-muted, #94a3b8);
}

.bb-float-tip__dismiss {
    flex-shrink: 0;
    align-self: center;
    margin-left: auto;
}

.bb-trip-controls {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.75rem;
    margin-top: 0;
    margin-bottom: 1rem;
}

.bb-trip-controls__block {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem 1.5rem;
    padding: 1rem 1.1rem;
    border: 1px solid rgba(56, 189, 248, 0.35);
    border-radius: 6px;
    background: linear-gradient(135deg, rgba(56, 189, 248, 0.08), rgba(0, 0, 0, 0.35));
}

.bb-trip-controls__block--start {
    border-color: rgba(34, 197, 94, 0.35);
    background: linear-gradient(135deg, rgba(34, 197, 94, 0.08), rgba(0, 0, 0, 0.35));
}

.bb-trip-controls__block.is-recording .bb-trip-controls__title {
    color: #86efac;
}

.bb-trip-controls__block.is-finished {
    border-color: rgba(148, 163, 184, 0.35);
    background: rgba(0, 0, 0, 0.25);
}

.bb-trip-controls__title {
    margin: 0 0 0.35rem;
    font-size: 0.85rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--bb-accent);
}

.bb-trip-controls__block--start .bb-trip-controls__title {
    color: #86efac;
}

.bb-trip-controls__block.is-finished .bb-trip-controls__title {
    color: var(--bb-muted);
}

.bb-trip-controls__hint {
    margin: 0;
    max-width: 42rem;
    font-size: 0.72rem;
    line-height: 1.5;
    color: var(--bb-muted);
}

.bb-trip-controls__status {
    margin: 0.5rem 0 0;
    font-size: 0.68rem;
    color: #86efac;
}

.bb-trip-controls__block.is-finished .bb-trip-controls__status {
    color: var(--bb-muted);
}

.bb-recording-onpage {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    margin: 0 0 1rem;
    padding: 0.65rem 0.85rem;
    border-radius: 8px;
    border: 1px solid rgba(239, 68, 68, 0.45);
    background: rgba(239, 68, 68, 0.08);
    font-family: "JetBrains Mono", monospace;
    font-size: 0.72rem;
    color: #fecaca;
}

.bb-recording-onpage__dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #ef4444;
    flex-shrink: 0;
    animation: bb-rec-pulse 1.4s ease-out infinite;
}

@keyframes bb-rec-pulse {
    0% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.55); }
    70% { box-shadow: 0 0 0 8px rgba(239, 68, 68, 0); }
    100% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0); }
}

.bb-memory-hint,
.bb-memory-empty {
    color: var(--bb-muted);
    font-size: 0.68rem;
    line-height: 1.45;
}

.bb-memory-note {
    display: block;
    margin-top: 0.2rem;
    font-size: 0.65rem;
    color: var(--bb-muted);
}

.oldsalt-toggle--panel {
    margin-left: auto;
}

.bb-btn--start {
    align-self: center;
    border-color: #22c55e;
    color: #bbf7d0;
    background: rgba(34, 197, 94, 0.15);
    min-width: 9rem;
}

.bb-btn--start:hover:not(:disabled) {
    background: rgba(34, 197, 94, 0.28);
}

.bb-btn--start:disabled {
    opacity: 0.55;
    cursor: not-allowed;
}

.bb-btn--finish {
    align-self: center;
    border-color: #22c55e;
    color: #bbf7d0;
    background: rgba(34, 197, 94, 0.15);
    min-width: 9rem;
}

.bb-btn--finish:hover:not(:disabled) {
    background: rgba(34, 197, 94, 0.28);
}

.bb-btn--finish:disabled {
    opacity: 0.55;
    cursor: not-allowed;
}

.bb-footer {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 0.35rem 0.75rem;
    margin-top: 0.75rem;
    font-size: 0.6rem;
    color: var(--bb-muted);
}

.bb-panel__intro {
    font-size: 0.62rem;
    color: var(--bb-muted);
    margin-bottom: 0.45rem;
    line-height: 1.4;
}

.bb-visus-tagline {
    color: var(--bb-accent);
    letter-spacing: 0.06em;
}

.bb-panel__head--visus {
    align-items: flex-start;
}

.bb-panel__head-title {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}

.bb-visus-powered {
    font-size: 0.62rem;
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: #38bdf8;
}

.bb-visus-tagline strong {
    font-weight: 700;
    letter-spacing: 0.12em;
}

.bb-ais-grid,
.bb-visus-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.4rem;
    margin-bottom: 0.5rem;
}

.bb-ais-metric {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.04);
    border-radius: 4px;
    padding: 0.35rem 0.45rem;
    min-width: 0;
}

.bb-ais-label {
    display: block;
    font-size: 0.52rem;
    letter-spacing: 0.14em;
    color: var(--bb-muted);
    text-transform: uppercase;
    margin-bottom: 0.15rem;
}

.bb-ais-value {
    font-size: 0.72rem;
    color: var(--bb-text);
    word-break: break-word;
}

.bb-risk--low { color: #94a3b8; }
.bb-risk--medium { color: var(--bb-amber); }
.bb-risk--high { color: var(--bb-nogo); }

.bb-ais-alarm {
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid rgba(239, 68, 68, 0.35);
    color: #fca5a5;
    padding: 0.4rem 0.5rem;
    border-radius: 4px;
    margin-bottom: 0.45rem;
    font-size: 0.68rem;
}

.bb-ais-target-list {
    list-style: none;
    max-height: 6rem;
    overflow-y: auto;
    font-size: 0.65rem;
    color: var(--bb-muted);
}

.bb-ais-target {
    padding: 0.2rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.bb-ais-target--alarm {
    color: #fca5a5;
}

.bb-visus-hint {
    font-size: 0.68rem;
    color: var(--bb-text);
    margin-bottom: 0.25rem;
    line-height: 1.4;
}

.bb-visus-note {
    font-size: 0.6rem;
    color: var(--bb-muted);
    margin-top: 0.35rem;
}

.bb-ai-label {
    display: inline-block;
    margin-top: 0.2rem;
    padding: 0.15rem 0.45rem;
    border-radius: 999px;
    border: 1px solid rgba(56, 189, 248, 0.35);
    color: #7dd3fc;
    font-size: 0.58rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.bb-info-btn {
    appearance: none;
    border: 1px solid rgba(148, 163, 184, 0.35);
    background: rgba(15, 23, 42, 0.7);
    color: #94a3b8;
    border-radius: 999px;
    width: 1.6rem;
    height: 1.6rem;
    cursor: pointer;
    font-size: 0.85rem;
    line-height: 1;
}

.bb-info-btn:hover {
    color: #e2e8f0;
    border-color: rgba(56, 189, 248, 0.5);
}

.bb-hist-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0.45rem;
    margin: 0.55rem 0;
}

.bb-hist-disclaimer {
    color: var(--bb-muted);
    font-size: 0.58rem;
    line-height: 1.45;
    margin: 0.35rem 0 0.55rem;
}

.bb-hist-corridor {
    margin-top: 0.35rem;
    padding-top: 0.45rem;
    border-top: 1px solid rgba(148, 163, 184, 0.12);
}

.bb-hist-corridor__svg {
    width: 100%;
    max-width: 420px;
    height: auto;
    display: block;
    margin: 0.35rem 0;
}

.bb-hist-corridor__caption {
    color: var(--bb-muted);
    font-size: 0.56rem;
}

@media (max-width: 900px) {
    .bb-hist-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

.bb-app.loading { opacity: 0.7; pointer-events: none; }

/* Keep replay map stable while other panels load */
.bb-app.loading .bb-panel--replaymap {
    opacity: 1;
    pointer-events: auto;
}

/* Tablet / narrow window — single column, readable on phone */
@media (max-width: 1280px) {
    .bb-header {
        grid-template-columns: 1fr;
        grid-template-areas:
            "brand"
            "title"
            "session";
        align-items: stretch;
    }

    .bb-header__session {
        max-width: none;
        align-items: stretch;
    }

    .bb-header__session .bb-btn {
        align-self: flex-start;
    }

    .bb-grid {
        grid-template-columns: 1fr;
        grid-template-areas:
            "timeline"
            "replaymap"
            "replay"
            "ais"
            "visus"
            "hist"
            "oldsalt"
            "memory"
            "debrief";
    }

    .bb-panel--replaymap {
        min-height: clamp(240px, 48vw, 340px);
    }

    .bb-trip-controls {
        grid-template-columns: 1fr;
    }

    .bb-metrics {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

/* Phone / PWA */
@media (max-width: 640px) {
    .bb-app {
        padding: 0.5rem 0.65rem 1rem;
    }

    .bb-header h1 {
        font-size: 1.35rem;
    }

    .bb-nav {
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    .bb-panel {
        padding: 0.55rem 0.6rem;
    }

    .bb-panel--replaymap {
        min-height: clamp(220px, 55vw, 300px);
    }

    .bb-metrics {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .bb-metric p {
        font-size: 0.72rem;
    }

    .bb-narrative {
        font-size: 0.82rem;
    }

    .bb-decision-actions .bb-btn {
        flex: 1 1 calc(50% - 0.25rem);
        min-width: 8rem;
    }

    .bb-scrubber-labels {
        flex-wrap: wrap;
        gap: 0.2rem;
    }

    .bb-timeline-track {
        min-height: 48px;
        -webkit-overflow-scrolling: touch;
    }

    .bb-marker {
        min-width: 24px;
    }

    .bb-ais-grid,
    .bb-visus-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

/* Very narrow phones */
@media (max-width: 400px) {
    .bb-metrics,
    .bb-ais-grid,
    .bb-visus-grid {
        grid-template-columns: 1fr;
    }

    .bb-decision-actions {
        flex-direction: column;
    }

    .bb-decision-actions .bb-btn {
        width: 100%;
    }
}